Specifications

lMli 66-064
Installation
AC POWER CONNECTION
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Employ a dedicated 117VAC 15 AMP circuit, with a
third-wire ground, supplied to a standard electrical
outlet (NEMA 5-133) for the AC power connection.
AC power connection is illustrated in Figure 3-2,
shown on the following page
l A plug-in power line surge protector should be
installed between the power cord and the AC outlet.
l Do not connect the AC power cord until the
installation has been checked.
l To apply AC power, connect the power cord to the
electrical outlet.
1 BATTERY BACK-UP
The common equipment provides an interface
connector for the connection of an optional external
battery assembly. This assembly is available
separately as a kit.
l Connecting the optional Comdial external battery
assembly to this interface provides a minimum of 1
hour of operation should the AC power to the
system be interrupted.
Be sure that the AC power cord is
connected to the electrical outlet before
connecting the external battery assembly
to the common equipment. This ensures
that internal protection circuitry is
operating to prevent damage which could
result from improper connection.
* During AC operation, the common equipment
provides re-charging current to maintain the
external battery potential at an operational level.
NOTE: The optional external battery assembly
requires approximately ten (IO) hours to
completely re-charge to full potential after it
has been completely discharged and, in some
cases, when initially installed.
SYSTEM GROUNDING
The common equipment has internal secondary surge
protection on all line ports. In order for this protection
to be effective, the common equipment cabinet MUST
be connected to a reliable earth ground such as a
metal cold water pipe or a building frame ground
System grounding is illustrated in Figure 3-2, shown
on the following page.
l The grounding wire must be of #lO or #12 insulated,
solid copper and separate from the three-wire AC
line cord.
l A ground stud is located on the common equipment
cabinet.
3-3